18109892329 has 9 divisors (see below), whose sum is σ = 18934749309. Its totient is φ = 17319545100.

The previous prime is 18109892287. The next prime is 18109892347. The reversal of 18109892329 is 92329890181.

The square root of 18109892329 is 134573.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 18109892329 - 2¹⁵ = 18109859561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18109892369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3092254 + ... + 3098104.

Almost surely, 2^18109892329 is an apocalyptic number.

18109892329 is the 134573-rd square number.

18109892329 is the 67287-th centered octagonal number.

It is an amenable number.

18109892329 is a deficient number, since it is larger than the sum of its proper divisors (824856980).

18109892329 is an frugal number, since it uses more digits than its factorization.

18109892329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11748 (or 5874 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 18109892329 in words is "eighteen billion, one hundred nine million, eight hundred ninety-two thousand, three hundred twenty-nine".